The AP6A355QSP-13 from Diodes Incorporated is a DC to DC Converter with Input Voltage 5.5 to 100 V, Output Voltage 1 1.2 to 50 V, Output Current 1 3.5 A, Operating Temperature -40 to 150 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for AP6A355QSP-13 can be seen below.